聚吡咯/海藻酸钠纳米球的制备及其应用于高性能超级电容器(英文)  

Preparation of Polypyrrole/Sodium Alginate Nanospheres and Their Application for High-Performance Supercapacitors

作　　者：马国富[1] 牟晶晶[1] 张稚国[1] 孙看军[2] 彭辉[1] 雷自强[1] 

机构地区：[1]西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,兰州730070 [2]兰州城市学院化学与环境科学学院,兰州730070

出　　处：《物理化学学报》2013年第11期2385-2391,共7页Acta Physico-Chimica Sinica

基　　金：supported by the National Natural Science Foundation of China(21164009,21174114);Program for Changjiang Scholars and Innovative Research Team in University,China(IRT1177)~~

摘　　要：用海藻酸钠作为结构导向剂,通过原位氧化聚合吡咯法制备了聚吡咯/海藻酸钠(PPy/SA)纳米球.聚吡咯/海藻酸钠纳米球的形貌和结构通过扫描电镜(SEM)、X射线衍射(XRD)和傅里叶变换红外(FTIR)光谱进行表征.材料的电化学性能通过循环伏安法和恒电流充放电方法进行测试.电化学测试表明,聚吡咯/海藻酸钠纳米球在1 mol L-1KCl电解液中,电流密度为1 A g-1时其比电容高达347 F g-1.与纯聚吡咯相比较,聚吡咯/海藻酸钠纳米球具有更优异的循环稳定性能.Polypyrrole/sodium alginate （PPy/SA） nanospheres are successfully synthesized by oxidative polymerization of pyrrole using sodium alginate as structural templating agent. The morphology and structure of the PPy/SA nanospheres were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, and Fourier transform infrared （FTIR） spectroscopy. Their electrochemical properties are investigated by cyclic voltammetry （CV） and galvanostatic charge-discharge tests. The PPy/SA nanospheres exhibit a high specific capacitance of 347 F. g-1 at a charge-discharge current density of 1 A.g-1 in 1 mol· L-1 KCI electrolyte. Unlike pure PPy, there was little attenuation in the capacitance of the PPy/SA nanospheres over 500 continuous charging-discharging cycles demonstrating good electrochemical stability. This result indicates that PPy/SA nanospheres are a promising candidate for high-performance supercapacitors.

关 键 词：聚吡咯 海藻酸钠 纳米球 超级电容器 电极材料 

分 类 号：TM53[电气工程—电器]